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opalfiles/Emacs.org
2021-10-22 23:44:03 -07:00

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Emacs Custom Configuration File

Preface

This document contains the fundamental elements of my Emacs configuration. Changes made to this file will reflect in init.el.

Table of Contents

General Configuration

Keep Folders Clean

Emacs package configuration files aren't standardized and as a result sometimes packages litter the emacs config folder. no-littering ensures that packages are kept organized.

;; Keep emacs folder tidy.
(use-package no-littering)

User Interface

;; Disables the doom splash screen
(setq inhibit-startup-message t)
(set-fringe-mode 10)

;; scroll 1 line at a time
(setq scroll-step 1)

;; Set visible bell
(setq visible-bell t)

(dolist (mode '(org-mode-hook
                shell-mode-hook))
  (add-hook mode (lambda () (display-line-numbers-mode 0))))

Theme Configuration

I am using Modus Themes, by Protesilaos Stavrou as they are minimal, pleasant to the eye, and conform to accessibility standards as outlined in WCAG AAA.

Modus Theme Configuration

;; Configure Modus theme
(use-package modus-themes
  :init
  (setq modus-themes-italic-constructs t
        modus-themes-bold-constructs nil
        modus-themes-region '(accented bg-only no-extend)
        modus-themes-org-blocks 'greyscale
        modus-themes-paren-match 'intense
        modus-themes-mixed-fonts t)

  ;; Load the theme files before enabling a theme
  (modus-themes-load-themes)
  :config

  (modus-themes-load-vivendi) ;; OR (modus-themes-load-vivendi)
  :bind ("<f5>" . modus-themes-toggle))

Font Configuration

Using Fira Code + Fira Code Retina.

;; Set fonts
(set-face-attribute 'default nil :font "Fira Code" :height 125 :weight 'medium)
(set-face-attribute 'variable-pitch nil :font "Fira Sans" :height 1.0 :weight 'regular)
(set-face-attribute 'fixed-pitch nil :font "Fira Code" :height 1.0 :weight 'medium)

Org Mode Configuration

Org Directory

;; Set org-mode directories
(setq org-directory
      '("~/org/"
        "~/.config/doom"))

General Configuration

(defun rymacs/org-mode-setup ()
  (org-indent-mode)
  (variable-pitch-mode 1)
  (visual-line-mode 1))

Center Org Buffers

(defun rymacs/org-mode-visual-fill ()
  (setq visual-fill-column-width 100
        visual-fill-column-center-text t)
  (visual-fill-column-mode 1))

(use-package visual-fill-column
  :hook (org-mode . rymacs/org-mode-visual-fill))

Set Fonts and Symbols

Here we are setting general font configuration in order to make editing in org mode a bit more streamlined to look at.

;; Change dashes to dots
(defun rymacs/org-font-setup ()
  (font-lock-add-keywords 'org-mode
                          '(("^ *\\([-]\\) "
                             (0 (prog1 () (compose-region (match-beginning 1) (match-end 1) "•"))))))

  ;; Set faces for heading levels
  (dolist (face '((org-level-1 . 1.2)
                  (org-level-2 . 1.1)
                  (org-level-3 . 1.05)
                  (org-level-4 . 1.0)
                  (org-level-5 . 1.1)
                  (org-level-6 . 1.1)
                  (org-level-7 . 1.1)
                  (org-level-8 . 1.1)))
    (set-face-attribute (car face) nil :font "Cantarell" :weight 'regular :height (cdr face)))

  ;; Ensure that anything that should be fixed-pitch in Org files appears that way
  (set-face-attribute 'org-block nil :foreground nil :inherit 'fixed-pitch)
  (set-face-attribute 'org-code nil   :inherit '(shadow fixed-pitch))
  (set-face-attribute 'org-table nil   :inherit '(shadow fixed-pitch))
  (set-face-attribute 'org-verbatim nil :inherit '(shadow fixed-pitch))
  (set-face-attribute 'org-special-keyword nil :inherit '(font-lock-comment-face fixed-pitch))
  (set-face-attribute 'org-meta-line nil :inherit '(font-lock-comment-face fixed-pitch))
  (set-face-attribute 'org-checkbox nil :inherit 'fixed-pitch))

;; Change ellipsis to triangles
(use-package org
  :hook (org-mode . rymacs/org-mode-setup)
  :config
  (setq org-ellipsis " ▾")
  (rymacs/org-font-setup))

;; Change default pretty bullets to circles
(use-package org-bullets
  :after org
  :hook (org-mode . org-bullets-mode)
  :custom
  (org-bullets-bullet-list '("◉" "○" "●" "○" "●" "○" "●")))

Visual Fill Mode

(defun rymacs/org-mode-visual-fill ()
  (setq visual-fill-column-width 100
        visual-fill-column-center-text t)
  (visual-fill-column-mode 1))

(use-package visual-fill-column
  :hook (org-mode . rymacs/org-mode-visual-fill))

Org Babel

Org Babel allows us to evaluate source code blocks within org mode. With this functionality, we can tell org babel to insert the content of the source block codes into any file specified by using the org-babel-tangle function.

Babel Languages

;; Load languages for babel code blocks.
(with-eval-after-load 'org
  (org-babel-do-load-languages
   'org-babel-load-languages
   '((emacs-lisp . t)
     (python .t)))

  (push '("conf-unix" . conf-unix) org-src-lang-modes))

Soure Block Creation Shortcuts

Here we use a package called org-tempo.

;; Make shortcuts to easily create babel source code blocks.
(with-eval-after-load 'org
  (require 'org-tempo)

  (add-to-list 'org-structure-template-alist '("sh" . "src shell"))
  (add-to-list 'org-structure-template-alist '("el" . "src emacs-lisp"))
  (add-to-list 'org-structure-template-alist '("py" . "src python")))

Babel => Configuration File Automation Hook

TODO: This needs to be fixed, or find an equiv. Since we don't want to have to manually use the org-babel-tangle function everytime we make changes to the corresponding .org file, we create an automation hook that executes the function every time we save.

;; ;; Define a function that automatically executes rymacs/org-babel-tangle-config (a wrapper around org-babel-tangle) when saving this file.
;; (defun rymacs/org-babel-tangle-config ()
;;   (when (string-equal (file-name-directory (buffer-file-name))
;;                       (expand-file-name "~/.dotfiles/.config/doom"))

;;      (let ((org-confirm-babel-evaluate nil))
;;        (org-babel-tangle))))

;; (add-hook 'org-mode-hook (lambda () (add-hook 'after-save-hook #'rymacs/org-babel-tangle-config)))

Remote Aliases

(defun connect-borg ()
  (interactive)
  (dired "/ssh:root@207.66.177.26#46668:/"))